At x=4, the graph of a function g shows an open circle at (4,5), while the rest of the curve approaches y=5 from both sides. A solid dot is placed at (4,7).
Answer the following:
a. (i) Find x→4−limg(x). (ii) Find x→4+limg(x). (iii) State whether x→4limg(x) exists. (iv) Is g continuous at x=4? Give reason.